Another 416 on the dyno

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MRL Performance

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The dyno is done! The 416 ran great. It has a great sound and ran very good. here is the run down:

340 block prepped for build
SCAT forged stroker kit
Pro Comp heads Stage 3 ported, this is about 90% porting
Hughes roller rockers
M1 intake (OOTB nothing done to it at all)
Quick Fuel Black Diamond 850 carb
Mallory dist/coil/wires
Accel plugs
Custom Lunati solid roller cam
MRL solid roller lifters
3/8 pushrods
ARP head bolts/main studs
Hughes main stud girdle
Billet timing set w/tensioner
MLS head gaskets
High flow oil filter stud and billet plate
New water pump and timing cover


It was ran on 93 octane pump gas, no issues at all. 10.3 to 1 compression. 34* total timing. It fired right up and ran strong the whole day. The carb was just about perfect right out of the box.

A/F was 12.35-12.84 the whole run and BSFC was .394-.435. VE was 100%+ from 4800-5800 rpm

It made
577HP at 5850 rpm
550TQ at 4800 rpm

I has a super flat torque curve. Its making 500+TQ from 3800-6000 rpm!!!! It held peak TQ of 550 from 4800-5200 rpm

And its making 500+HP from 4800 rpm on up. It held 570HP+ from 5600-6000 rpm!

It is running very clean and very strong. On the street it will sound like a freaking beast, and run like one too. All that torque will plant you back in the seat hard.
 

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Drool
Oh and what do your pro comp heads run money wise ? Do do you helicoil the bolt holes?
 
Cam specs ?
Headers size ?
Hand or CNC ported heads ?

Cam is my design. All I will tell you is it pulls hard, and engine has 10" vacuum at 900 idle.

Headers are our std dyno headers 1 5/8 to 1 3/4 step, like a TTI, w 3" collector

Heads are the CNC with very little hand work. If I spend more time with the hand blending they flow about 10-13cfm more. These flow 300/224cfm at .550"
 
Cam is my design. All I will tell you is it pulls hard, and engine has 10" vacuum at 900 idle.

Headers are our std dyno headers 1 5/8 to 1 3/4 step, like a TTI, w 3" collector

Heads are the CNC with very little hand work. If I spend more time with the hand blending they flow about 10-13cfm more. These flow 300/224cfm at .550"

Thanks for the reply. I bet some work in that M1 would get you in the 600 range. The couple that I've had in hand were pretty "rough".:thumbrig:
 
Yup. I wanted to keep the velocity up for the bottom end so I kept the ports a bit smaller on the intake. I have ported the M1's out before and had some great top end power, but it sucked too much of the low end away. So its a bit of a compromise.

I just went thru this in the Spring. I spend about 15hrs porting out a Victor, got 596HP, but it killed the power under 4000rpm. It all worked out in the end(light car tall gears). But porting intakes is a lot harder to do than heads, and sometimes the time spent isnt worth the reward.
 
Yup. I wanted to keep the velocity up for the bottom end so I kept the ports a bit smaller on the intake. I have ported the M1's out before and had some great top end power, but it sucked too much of the low end away. So its a bit of a compromise.

I just went thru this in the Spring. I spend about 15hrs porting out a Victor, got 596HP, but it killed the power under 4000rpm. It all worked out in the end(light car tall gears). But porting intakes is a lot harder to do than heads, and sometimes the time spent isnt worth the reward.
mike , do you know what runners are th weak ones on a 440 victor intake ? still haven`t got around to needin the lifters, will call tho, gettin antsy to start on the 505 again.----------bob:-?
 
Hi Mike,
You've used a few of these heads, right? How's the supply chain for them? Have you tried other rockers or always Hughes?
 
I have never had Procomp rockers, and most likely never will. I like the Hughes and the SS PRW's
 
:blob:killer build , when a builder doesn't care to dyno any of his engines that means he isn't ashamed of them, he lets the numbers do the talking, and a guy that doesn't care to help and answer any questions, that's why he got my business
 
I could not recist to uppload my report from when I drove my Valiant on a Dyno-road.
It has a 273 Commando that I put together with what I thought was right.
318 flow ported heads with 2.02/1.60 Stainless valves.
340S camshaft
Edelbrock 1406
Open-Air dual plane intake from China :)
Hei Distrubutor.
NO HEADERS.
2.5" dual exhaust with an X
runs on 95 oktan and is a Dream to Cruise with.

904 Lock Up.
8.3/4" with 3.23 gear.

it spit out 467hp/739Tq/4500Rpm.....:glasses7:
 

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I could not recist to uppload my report from when I drove my Valiant on a Dyno-road.
It has a 273 Commando that I put together with what I thought was right.
318 flow ported heads with 2.02/1.60 Stainless valves.
340S camshaft
Edelbrock 1406
Open-Air dual plane intake from China :)
Hei Distrubutor.
NO HEADERS.
2.5" dual exhaust with an X
runs on 95 oktan and is a Dream to Cruise with.

904 Lock Up.
8.3/4" with 3.23 gear.

it spit out 467hp/739Tq/4500Rpm.....:glasses7:

That engine needs to be pulled immediately and sold to our Smithsonian Institute here in the US...
 
Yup. I wanted to keep the velocity up for the bottom end so I kept the ports a bit smaller on the intake. I have ported the M1's out before and had some great top end power, but it sucked too much of the low end away. So its a bit of a compromise.

I just went thru this in the Spring. I spend about 15hrs porting out a Victor, got 596HP, but it killed the power under 4000rpm. It all worked out in the end(light car tall gears). But porting intakes is a lot harder to do than heads, and sometimes the time spent isnt worth the reward.

Another strong stroker Mike. No reason why you can't have a little of both bottom and top end. This mill would be great for a street car with a fairly mild convertor and rear gear.. It would pull like a bull elephant. tmm
 
I have built a few SBM like this, with the same cam and head flow, but with the RPM intake. The torque started out a little earlier, but didnt make any more(550), the M1 pulled a little better on the top end(577 vs 560) and had a few more RPM's to work with. Its a good combo and Im very happy with the results.
 
I could not recist to uppload my report from when I drove my Valiant on a Dyno-road.
It has a 273 Commando that I put together with what I thought was right.
318 flow ported heads with 2.02/1.60 Stainless valves.
340S camshaft
Edelbrock 1406
Open-Air dual plane intake from China :)
Hei Distrubutor.
NO HEADERS.
2.5" dual exhaust with an X
runs on 95 oktan and is a Dream to Cruise with.

904 Lock Up.
8.3/4" with 3.23 gear.

it spit out 467hp/739Tq/4500Rpm.....:glasses7:

It must be from another universe, it defies the laws of physics in our world...
 
I could not recist to uppload my report from when I drove my Valiant on a Dyno-road.
It has a 273 Commando that I put together with what I thought was right.
318 flow ported heads with 2.02/1.60 Stainless valves.
340S camshaft
Edelbrock 1406
Open-Air dual plane intake from China :)
Hei Distrubutor.
NO HEADERS.
2.5" dual exhaust with an X
runs on 95 oktan and is a Dream to Cruise with.

904 Lock Up.
8.3/4" with 3.23 gear.

it spit out 467hp/739Tq/4500Rpm.....:glasses7:
That torque is CRAZY!!!!
 
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